Money? There's some in nanotechnology (4)

I believe the answer is:

note

'money?' is the definition.
(thesaurus)

'there's some in nanotechnology' is the wordplay.
'there's some' indicates a hidden word.
'NOTE' is hidden in the letters of 'in nanotechnology'.

(Other definitions for note that I've seen before include "Record; memo" , "Traitor" , "Brief letter - distinction" , "It could be me" , "Observation" .)

I've seen this clue in The Telegraph.

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